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Curiosity rover begins vaporizing Mars, one rock at a time (+video)

A Martian rock dubbed 'Coronation' became the first victim of the Curiosity rover's ChemCam, which vaporizes rocks with a laser and examines the sparks to determine the chemical composition of the Red Planet's surface.

Built by the Los Alamos National Laboratory, the ChemCam is designed to use imaging and laser-induced breakdown spectroscopy to determine rock and soil compositions on Mars, up to 9 meters from the rover.
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A NASA rover has fired the first laser gun on Mars to take a peek inside a small Martian rock.

The Mars rover Curiosity zapped a rock scientists are now calling "Coronation" on Sunday (Aug. 19) to test an instrument that measures the composition of targets hit by its powerful laser beam. The rover fired 30 laser pulses in 10 seconds at the fist-size Coronation rock in order to analyze the results.

"We got a great spectrum of Coronation — lots of signal," said Roger Wiens, lead scientist for the rover's laser-wielding instrument at the Los Almos National Laboratory in New Mexico, in a statement. "Our team is both thrilled and working hard, looking at the results. After eight years building the instrument, it's payoff time!"

Curiosity's Chemical and Camera instrument, or ChemCam, fires a laser pulses that last just five one-billionths of a second but deliver more than a million watts of power, enough to turn solid rock into an ionized plasma. A trio of spectrometers in the tool then studies the sparks from the laser fire on 6,144 different wavelengths of ultraviolet, visible and infrared light to determine the composition of the vaporized rock.

Sunday's laser firing was primarily target practice for Curiosity, but early results suggest the high-tech instrument is working well, mission managers said. Data from the test showed ChemCam is performing even better than in ground tests on Earth, they added.

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